Q: What is the sum of all factors of the number 81,878,502 excluding 81,878,502?

Why is 87,161,370 the sum of all factors of 81,878,502, excluding 81,878,502?

The factors of the number 81,878,502 are: 1, 2, 3, 6, 31, 62, 93, 186, 440207, 880414, 1320621, 2641242, 13646417, 27292834, 40939251, 81878502.

If you add them up, you will get the total of 81,878,589. Now subtract 81,878,502 to get 87,161,370

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